This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

Notorious artist squat renovated into legal studios.

An architectural oddity where the triglyphs of the courtyard of walls create an optical illusion.

A large statue of Pope Gregory XIII in Bologna was disguised as Saint Petronius to avoid destruction.

A striking memorial recalls thousands of Bolognese men and women killed fighting fascists in World War II.

This building features dozens of faces along its facade, although one is a bit chilling.

Once known for its horse-powered knife sharpening, this 200-year-old shop offers an array of blades and hard-to-find culinary tools.

Legend has it this fountain built to symbolize the Pope’s power hides a strange secret concerning Neptune's manliness.

In the world's oldest university is a stunning 17th century anatomical theater carved from spruce.

Over 100 towers were built in Bologna during the Middle Ages, but only 22 survive.

This natural gas vent certainly earns its name as the smallest volcano in Italy.

Crushed coral and crystals give the sand its signature coloration.

First founded in 1472, this is the oldest bank in the world. Its history may explain why we call financial institutions "banks."

A dismembered holy head stares out from her beautiful reliquary at the St. Dominic Basilica.

The only visible reminders of an elaborate engineering project that kept the tower from reaching the tipping point.

This Tuscan church contains a gallery of over 700 ex-votos depicting near-death experiences.

One of the oldest still-working clocks in the world sits on an ancient tower.

An unusual sculpture with a meaning shrouded in mystery.

The roof of this ancient mausoleum is made from a single Istrian stone weighing a massive 230 tons.

A medieval, mosaic-lined baptistry built by a heretical Christian sect.

Psychoanalyst Carl Jung reported a paranormal experience after visiting this mosaic-lined Roman baptistry.

Filled with goldfish swimming in a shallow pool of sea water, this ancient crypt is more wishing well than burial site.

Destroyed numerous times, this centuries-old bridge has always been rebuilt with its original design.

This airport currywurst stand is made out of retro airplane parts.